Alert archive / Oklahoma / River Flood Advisories in 2021

River Flood Advisory 17, NWS Norman, OK

April 28, 2021Hughes County, Oklahoma

NWS Norman, OK issued this river flood advisory at Apr 28, 2021, 11:39 AM CDT for Hughes County, Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 28, 2021, 11:39 AM CDT (16:39 UTC)
Expired: Apr 28, 2021, 2:07 PM CDT
In force: 2 hr
Issued by: NWS Norman, OK
Area: Storm-based polygon

County Hughes County, OK

The radar

The Norman radar (KTLX), 100 km from the middle of the area, began a volume at 16:41 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The river

Written for the forecast point Canadian River near Calvin (CLVO2). The gauge peaked at 21.40 ft at Apr 28, 2021, 5:00 PM CDT.

Action stage: 18 ft
Minor stage: 20 ft
Moderate stage: 23 ft
Major stage: 25 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 07231500, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

The text

As transmitted.

452 
WGUS84 KOUN 281639
FLSOUN

Flood Advisory
National Weather Service Norman OK
1139 AM CDT Wed Apr 28 2021

...The National Weather Service in Norman has issued a Flood 
Advisory for the following rivers in Oklahoma...

  Canadian River near Calvin affecting Hughes County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Additional information is available at www.weather.gov.


OKC063-290445-
/O.NEW.KOUN.FL.Y.0017.210428T1639Z-210429T1200Z/
/CLVO2.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
1139 AM CDT Wed Apr 28 2021

The National Weather Service in Norman has issued a

* Flood Advisory for
  the Canadian River near Calvin.
* From this morning to Thursday morning.
* At 11:00 AM CDT Wednesday the stage was 17.9 feet.
* Action stage is 18.0 feet.
* Flood stage is 20.0 feet.
* Forecast...The Canadian River is expected to rise to a crest of 
  18.7 feet this afternoon.
* Impact...At 19.0 feet, Croplands... pastures... oilfields... and 
  local roads may sustain shallow overflows. Upstream areas along 
  the river in northern Pontotoc... southern Seminole... and west 
  central Hughes counties are covered before the areas near Calvin. 
  Downstream areas in eastern Hughes County are affected hours later.


&&

LAT...LON 3483 9649 3494 9649 3508 9627 3520 9598
      3504 9598 3490 9620

$$

SK

1 follow-up statement

171 
WGUS84 KOUN 281907
FLSOUN

Flood Advisory
National Weather Service Norman OK
207 PM CDT Wed Apr 28 2021

...The Flood Advisory is replaced with a River Flood Warning for the 
following rivers in Oklahoma...

  Canadian River near Calvin affecting Hughes County.

OKC063-282015-
/O.CAN.KOUN.FL.Y.0017.000000T0000Z-210428T1907Z/
/CLVO2.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.NO/
207 PM CDT Wed Apr 28 2021

...The Flood Advisory for the Canadian River near Calvin has been 
replaced...

The Flood Advisory is replaced by a river flood warning for
  the Canadian River near Calvin.
* At 1:00 PM CDT Wednesday the stage was 19.9 feet.
* Flood stage is 20.0 feet.
* Forecast...The Canadian River is expected to rise to a crest of 
  20.5 feet this evening. It will then fall below flood stage late 
  this evening.


&&

LAT...LON 3483 9649 3494 9649 3508 9627 3520 9598
      3504 9598 3490 9620

$$

SK

What forecasters said that day

The local office's own words before this river flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this river flood advisory went out at Apr 28, 6:33 AM CDT, 5 hours 6 minutes earlier.

Area forecast discussion, Apr 28, 6:33 AM CDT, 5 hours 6 minutes before

Area Forecast Discussion
National Weather Service Norman OK
633 AM CDT Wed Apr 28 2021

...New AVIATION, UPPER AIR...

.SHORT TERM...
(Today and tonight)
Issued at 343 AM CDT Wed Apr 28 2021

The overall synoptic pattern has not changed from yesterday with
a broad, slow-moving upper-level low across the southwest U.S. and
attendant southwest flow downstream across the Southern Plains.
As one of round convection moves eastward, isentropic ascent
downstream from the aforementioned low has resulted in another
round of convection that has developed across northwest Texas into
southwest Oklahoma.

Transient, low-topped supercell structures have been occasionally
seen with the convection tonight (characteristic of a more
tropical air mass). With continued moderate low-level wind (0-1 km
shear of ~25 to 30 knots), low LCLs, and a rather moist
environment, occasional low-level circulations with an attendant
tornado threat remain possible this morning. In addition, flash
flooding will likely occur in some locations as convection trains
over areas that already received significant rainfall.

This area of convection is expected to gradually shift to the
northeast this morning as the low-level jet weakens and shifts
slightly to the east. Similar to yesterday, the amount of recovery
and attendant buoyancy will be critical on the magnitude of
afternoon/evening severe convection. Currently, it appears the
most likely area for recovery for severe thunderstorms will be
across western north Texas into southwest Oklahoma and perhaps
into central Oklahoma.

The synoptic front (which is expected to move into northwest
Oklahoma this morning) and any remnant boundaries from the earlier
convection should serve as a focus for redevelopment. Current
indications are the synoptic front should be in close proximity to
I-44 by late afternoon. Similar to yesterday, mesoscale trends
will have to be monitored carefully today (e.g., if the surface
front is farther southeast or northeast than forecast, that would
shift the greater risk of severe weather).

In addition to severe thunderstorms with all potential hazards,
heavy rainfall/flooding will continue to be a hazard. Opted to
remove Kay County from ongoing Flood Watch given the trends that
the more significant rainfall should stay the southeast. It would
not be surprising if additional counties in north central Oklahoma
could be canceled early later today.

Mahale

&&

.LONG TERM...
(Thursday through Tuesday)
Issued at 343 AM CDT Wed Apr 28 2021

Rain should end on Thursday as the cold front accelerates
southeastward in response to trough digging across the Midwest.
The trend is for the upper-level low that affected us today to
cutoff across southwest Texas. The uncertainty is when will the
low finally move eastward and affect our weather. Currently, most
guidance would suggest the low will eventually eject to the
northeast into the Southern Plains on Sunday. This should temper
the warmup some (notably across the eastern half of the area) and
also result in a chance for showers--especially across southeast
Oklahoma.

The next chance of rain still looks to be around Tuesday of next
week as a trough and attendant cold front approaches the Plains.

Mahale

&&

.AVIATION...
(12Z TAFS)
Issued at 633 AM CDT Wed Apr 28 2021

An area of showers and thunderstorms will continue to move to the
northeast this morning. A break in convection is expected late
morning into the early afternoon before additional showers and
thunderstorms develop this afternoon/evening as a cold front
moves through the area. Convection is most likely to affect KSPS,
KLAW, and KOKC/KOUN.

MVFR to occasionally IFR ceilings/visibilities are expected with
any convection. Some thunderstorms may be strong to severe with
gusty, chaotic winds.

Winds will shift from the south/southeast to the north as the
cold front moves through.

Mahale

&&

.UPPER AIR...
Issued at 633 AM CDT Wed Apr 28 2021

No upper air flight will occur this morning due to ongoing
weather. An upper air flight may occur early this afternoon.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  76  58  70  51 /  90  60  30  10
Hobart OK         77  55  70  48 /  80  40  30  10
Wichita Falls TX  79  59  71  52 /  90  70  40  30
Gage OK           75  50  72  43 /  30  30  10  10
Ponca City OK     77  57  73  48 /  80  70  20  10
Durant OK         81  63  73  55 /  80 100  70  30

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Flood Watch through Thursday morning for OKZ013-019-020-023>032-
     037>048-050>052.

TX...Flood Watch through Thursday morning for TXZ085-086-088>090.

&&

SHORT TERM...10
LONG TERM....10
AVIATION...10

Hazardous weather outlook, Apr 28, 4:06 AM CDT, 7 hours 33 minutes before

Hazardous Weather Outlook
National Weather Service Norman OK
406 AM CDT Wed Apr 28 2021

OKZ004>048-050>052-TXZ083>090-290915-
Harper-Woods-Alfalfa-Grant-Kay-Ellis-Woodward-Major-Garfield-
Noble-Roger Mills-Dewey-Custer-Blaine-Kingfisher-Logan-Payne-
Beckham-Washita-Caddo-Canadian-Oklahoma-Lincoln-Grady-McClain-
Cleveland-Pottawatomie-Seminole-Hughes-Harmon-Greer-Kiowa-Jackson-
Tillman-Comanche-Stephens-Garvin-Murray-Pontotoc-Coal-Cotton-
Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan-Hardeman-
Foard-Wilbarger-Wichita-Knox-Baylor-Archer-Clay-
406 AM CDT Wed Apr 28 2021

This hazardous weather outlook is for portions of northern...
western...central...and southern Oklahoma...and western north
Texas.

.DAY ONE...Today and Tonight...

.Thunderstorms...
Thunderstorms are expected this morning, primarily southeast of
I-44. The primary hazard from the most intense storms are gusty
winds and brief tornadoes.

Additional thunderstorms are expected to redevelop this afternoon
into the evening, especially along and southeast of I-44. Large
hail and gusty winds are possible. There is also a low tornado
risk.

.Heavy Rainfall and Flooding...
Heavy rainfall could result in flash flooding across portions of
central and southern Oklahoma and western north Texas through
tonight.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...
Storm spotter groups and emergency management personnel should
prepare for severe weather operations through tonight.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday...

.Thunderstorms...
Thunderstorms should exit the area Thursday morning. Additional
thunderstorms are possible late Monday into Tuesday of next week.

Get graphics and more details at weather.gov/norman...and follow
our weather forecast office on Twitter and Facebook.

Mahale

In the hours before

Special weather statement, Apr 28, 8:47 AM CDT, 2 hours 52 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
847 AM CDT Wed Apr 28 2021

OKZ042-281415-
Pontotoc OK-
847 AM CDT Wed Apr 28 2021

...SIGNIFICANT WEATHER ADVISORY FOR central Pontotoc County Until 915
AM CDT...

AT 845 AM CDT, a strong thunderstorm was located near Fitzhugh,
moving northeast at 30 MPH. Weak rotation is also indicated with
this storm.

HAZARDS INCLUDE...
Wind gusts to 50 MPH...
Heavy rain can lead to reduced visibility...

LAT...LON 3476 9644 3465 9686 3471 9691 3491 9665
      3490 9664 3490 9659
TIME...MOT...LOC 1345Z 235DEG 26KT 3471 9682

MAD

Special weather statement, Apr 28, 8:56 AM CDT, 2 hours 43 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
856 AM CDT Wed Apr 28 2021

OKZ032-042-281430-
Pontotoc OK-Hughes OK-
856 AM CDT Wed Apr 28 2021

...SIGNIFICANT WEATHER ADVISORY FOR northeastern Pontotoc and central
Hughes Counties Until 930 AM CDT...

AT 854 AM CDT, a strong thunderstorm was located near Atwood, moving
northeast at 25 MPH. Weak rotation is also indicated with this storm.

HAZARDS INCLUDE...
Wind gusts to 50 MPH...
Heavy rain can lead to reduced visibility...

LAT...LON 3505 9607 3505 9609 3496 9609 3483 9637
      3489 9646 3520 9623 3507 9606
TIME...MOT...LOC 1354Z 224DEG 21KT 3491 9635

MAD

Local storm report, Apr 28, 11:11 AM CDT, 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1111 AM CDT WED APR 28 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0844 AM     FLASH FLOOD      1 NE ADA                34.79N 96.65W
04/28/2021                   PONTOTOC           OK   TRAINED SPOTTER

            SPOTTER REPORTED 6-12 INCHES OF STANDING
            WATER WITH WATER RUSHING INTO SOME HOMES.

&&

RCB

Local storm report, Apr 28, 11:15 AM CDT, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1115 AM CDT WED APR 28 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0915 AM     FLASH FLOOD      2 ENE ADA               34.79N 96.63W
04/28/2021                   PONTOTOC           OK   TRAINED SPOTTER

            LAKE IN THE PARK ON THE SOUTHEAST SIDE OF
            ADA IS 8-12 INCHES OVER THE BANK.

&&

RCB

Local storm report, Apr 28, 11:22 AM CDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1122 AM CDT WED APR 28 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0930 AM     FLASH FLOOD      ADA                     34.78N 96.66W
04/28/2021                   PONTOTOC           OK   PUBLIC

            VIDEOS/PICTURES ON TWITTER OF WATER RUSHING
            OVER STREETS/BRIDGES IN ADA. TIME WAS
            DOCUMENTED AT THE TIME OF THE TWEET.

&&

RCB

Local storm report, Apr 28, 11:23 AM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1123 AM CDT WED APR 28 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0845 AM     FLASH FLOOD      1 S ADA                 34.76N 96.66W
04/28/2021                   PONTOTOC           OK   PUBLIC

            REPORT FROM MPING: HOMES OR BUILDINGS FILLED
            WITH WATER.

&&

RCB

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 27, 7:15 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	45 min
Apr 27, 7:19 PM CDT	Tornado Warning	OUN	Tillman	41 min
Apr 27, 7:53 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	52 min
Apr 27, 8:10 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	50 min
Apr 27, 8:46 PM CDT	Special Weather Statement	OUN	Comanche	29 min
Apr 27, 9:01 PM CDT	Special Weather Statement	OUN	Cotton	29 min
Apr 27, 9:55 PM CDT	Special Weather Statement	OUN	Stephens	50 min
Apr 27, 10:35 PM CDT	Special Weather Statement	OUN	Pottawatomie	25 min
Apr 27, 10:43 PM CDT	Special Weather Statement	OUN	Tillman	32 min
Apr 27, 10:46 PM CDT	Special Weather Statement	OUN	McClain	44 min
Apr 27, 11:05 PM CDT	Special Weather Statement	OUN	Pottawatomie, Seminole	25 min
Apr 27, 11:24 PM CDT	Special Weather Statement	OUN	Cleveland, Garvin, McClain	36 min
Apr 27, 11:41 PM CDT	Special Weather Statement	OUN	Seminole	34 min
Apr 27, 11:42 PM CDT	Special Weather Statement	OUN	Cotton	33 min
Apr 27, 11:49 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, McClain, Murray	26 min
Apr 27, 11:58 PM CDT	Tornado Warning	OUN	Garvin, McClain	17 min
Apr 28, 12:13 AM CDT	Tornado Warning Tornado observed	OUN	Cleveland, Garvin, McClain, Pottawatomie	32 min
Apr 28, 12:27 AM CDT	Areal Flood Advisory	OUN	Carter, Garvin, McClain, Murray, Stephens	3 hr
Apr 28, 12:47 AM CDT	Flash Flood Warning	OUN	Garvin	8 hr
Apr 28, 12:59 AM CDT	Areal Flood Advisory	OUN	Cleveland, Pottawatomie, Seminole	4 hr
Apr 28, 1:31 AM CDT	Special Weather Statement	OUN	Pottawatomie	29 min
Apr 28, 1:40 AM CDT	Areal Flood Advisory	OUN	Pontotoc, Pottawatomie, Seminole	3 hr
Apr 28, 1:43 AM CDT	Special Weather Statement	OUN	Seminole	32 min
Apr 28, 3:11 AM CDT	Flash Flood Warning	OUN	Carter, Cotton, Jefferson, Murray, Stephens	6 hr
Apr 28, 3:28 AM CDT	Special Weather Statement	OUN	Garvin	32 min
Apr 28, 3:56 AM CDT	Special Weather Statement	OUN	Murray	34 min
Apr 28, 4:09 AM CDT	Special Weather Statement	OUN	Garvin	36 min
Apr 28, 4:25 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, McClain, Stephens	35 min
Apr 28, 4:27 AM CDT	Special Weather Statement	OUN	Pontotoc	33 min
Apr 28, 5:05 AM CDT	Special Weather Statement	OUN	Hughes	25 min
Apr 28, 5:09 AM CDT	Areal Flood Advisory	OUN	Hughes, Pontotoc, Pottawatomie, Seminole	4 hr
Apr 28, 5:24 AM CDT	River Flood Warning	OUN	Pottawatomie, Seminole	18 hr
Apr 28, 6:19 AM CDT	River Flood Advisory	OUN	Carter, Garvin, Murray	4 hr
Apr 28, 6:33 AM CDT	Flash Flood Warning	OUN	Garvin, Hughes, McClain, Murray, Pontotoc, Pottawatomie and 1 more	4 hr
Apr 28, 8:02 AM CDT	Special Weather Statement	OUN	Murray	28 min
Apr 28, 8:15 AM CDT	Special Weather Statement	OUN	Pontotoc	30 min
Apr 28, 8:33 AM CDT	Severe Thunderstorm Warning	OUN	Hughes, Pontotoc	27 min
Apr 28, 8:47 AM CDT	Special Weather Statement	OUN	Pontotoc	28 min
Apr 28, 8:48 AM CDT	Areal Flood Advisory	OUN	Coal, Hughes, Johnston, Pontotoc	3 hr
Apr 28, 8:56 AM CDT	Special Weather Statement	OUN	Hughes	34 min
Apr 28, 9:03 AM CDT	Flash Flood Warning	OUN	Carter, Garvin, Jefferson, McClain, Murray, Stephens	117 min
Apr 28, 9:14 AM CDT	Flash Flood Warning Considerable damage threat	OUN	Coal, Hughes, Pontotoc, Seminole	3 hr
Apr 28, 9:16 AM CDT	Flash Flood Warning Considerable damage threat	OUN	Coal, Hughes, Pontotoc, Seminole	3 hr
Apr 28, 9:53 AM CDT	River Flood Warning	OUN	Hughes, Seminole	35 hr
Apr 28, 9:56 AM CDT	River Flood Warning	OUN	Carter, Garvin, Murray	13 hr
Apr 28, 9:59 AM CDT	Areal Flood Advisory	OUN	Carter, Jefferson, Johnston, Love, Marshall, Murray	3 hr
Apr 28, 10:46 AM CDT	Flash Flood Warning	OUN	Carter, Johnston, Love, Marshall	4 hr
Apr 28, 11:01 AM CDT	Areal Flood Warning	OUN	Carter, Garvin, Hughes, McClain, Murray, Pontotoc and 2 more	3 hr
Apr 28, 11:43 AM CDT	Special Weather Statement	OUN	Kay	47 min
Apr 28, 11:59 AM CDT	Special Weather Statement	OUN	Garfield, Kingfisher	31 min
Apr 28, 12:16 PM CDT	Areal Flood Warning	OUN	Coal, Hughes, Pontotoc, Seminole	4 hr
Apr 28, 1:20 PM CDT	Areal Flood Advisory	OUN	Bryan, Marshall	3 hr
Apr 28, 1:31 PM CDT	Areal Flood Advisory	OUN	Cleveland, Grady, McClain, Oklahoma	4 hr
Apr 28, 1:31 PM CDT	Special Weather Statement	OUN	Garfield	29 min
Apr 28, 1:45 PM CDT	Special Weather Statement	OUN	Garfield	30 min
Apr 28, 2:07 PM CDT	River Flood Warning	OUN	Hughes	9 hr
Apr 28, 2:22 PM CDT	Special Weather Statement	OUN	Love	23 min
Apr 28, 2:38 PM CDT	Special Weather Statement	OUN	Canadian	22 min
Apr 28, 2:46 PM CDT	Areal Flood Advisory	OUN	Carter, Johnston, Love, Marshall	3 hr
Apr 28, 3:17 PM CDT	Areal Flood Advisory	OUN	Caddo, Canadian, Grady, Kingfisher, Logan, Oklahoma	3 hr
Apr 28, 3:22 PM CDT	Special Weather Statement	OUN	Logan	23 min
Apr 28, 3:52 PM CDT	Special Weather Statement	OUN	Caddo	23 min
Apr 28, 3:54 PM CDT	River Flood Warning	OUN	Carter, Johnston, Murray	31 hr
Apr 28, 3:56 PM CDT	Areal Flood Advisory	OUN	Caddo, Comanche	3 hr
Apr 28, 4:19 PM CDT	Special Weather Statement	OUN	Lincoln	26 min
Apr 28, 4:21 PM CDT	Special Weather Statement	OUN	Caddo	24 min
Apr 28, 4:23 PM CDT	Special Weather Statement	OUN	Logan, Noble	37 min
Apr 28, 4:48 PM CDT	Special Weather Statement	OUN	Grady	42 min
Apr 28, 4:56 PM CDT	Areal Flood Advisory	OUN	Noble	3 hr
Apr 28, 5:01 PM CDT	Special Weather Statement	OUN	Noble	44 min
Apr 28, 5:23 PM CDT	Special Weather Statement	OUN	Johnston	37 min
Apr 28, 5:36 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Johnston	24 min
Apr 28, 5:40 PM CDT	Special Weather Statement	OUN	Oklahoma	35 min
Apr 28, 6:02 PM CDT	Special Weather Statement	OUN	Atoka	28 min
Apr 28, 6:26 PM CDT	Special Weather Statement	OUN	Washita	49 min
Apr 28, 6:59 PM CDT	Special Weather Statement	OUN	Caddo	46 min

Nearby

River Flood Advisories in Oklahoma, 2021 Every river flood advisory in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.